help...treo...got warm then hot now wont go past enable local time

Any suggestions - working fine then all of a sudden got warm...then hot...then stopped working...I took out the battery let it cool for a while, then put battery back in it got as far as enable local time then stopped....unable to type or use stylus...then eventually screen went dark. Repeated cooling then turned on did soft then warm resets...to no avail...am I um out of luck? Called Sprint, they will send new phone but due to recent work email/calendar system upgrade, I can't hotsynch my email or calendar at work properly, that of course is being worked on by others.....